IIR O-rings 65 Shore A

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Butyl rubber, sometimes referred to simply as butyl, is a synthetic rubber, a copolymer of isobutylene and isoprene. The abbreviation IIR stands for isobutylene isoprene rubber.

Polyisobutene, also known as PIB or polyisobutene, is the homopolymer of isobutylene, or 2-methyl-1-propene, on which butyl rubber is based.

Butyl rubber is produced by polymerization of approximately 98% isobutylene with approximately 2% isoprene. Polyisobutylene is structurally similar to polypropylene, but it has two methyl groups that are substituted on each other carbon atom instead of one. Polyisobutylene is a colorless to slightly yellow visco-elastic material. It is generally odorless and tasteless, although it may have a slight characteristic odor.

After isobutylene and polyisobutylene were already discovered, it was later developed into butyl rubber in 1937 by researchers William J Sparks and Robert M Thomas in the Standard Oil of New Jersey laboratory in Linden, NJ. Today, most of the worldwide supply of butyl rubber is produced by two companies. Exxonmobil and Polymer Corporation.

In the 1950s and 1960s, halogenated butyl rubber (halobutyl) was developed, in the chlorinated (chlorobutyl) and brominated (bromobutyl) variants, with considerably higher curing speeds and covulcanization with other rubbers such as natural rubber and styrene-butadiene rubber. Halobutyl is today the most important material for the inner linings of tubeless tires.

Benefits IIR:
• Excellent low gas permeability
• Good flexibility
• Good electrical properties
• Good chemical resistance
• Good moisture resistance
• Good wear resistance
• It can function for a longer time at -50 degrees to +120 degrees
• It has good ozone and aging resistance
• Excellent air impermeability
• Good flex properties
• Is known for its high degree of gas tightness
• Good weather resistance
• Resistant to acids and alkalis oxidation sunlight

Downsides of IIR:
 - Cannot be used with mineral oils

On this page we offer our range of 65 Shore A O-Rings. Search for your specific O ring by using the filters on the left of the page or take your time and browse our wide range of our products. When you can not find the product you are looking for in our 65 Shore A made from IIR, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 134,2x5,7 IIR 65 Shore A - Black - ORSV2-134,2x5,7-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 280x10 IIR 65 Shore A - Black - ORSV2-280x10-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 190x5 IIR 65 Shore A - Black - ORSV2-190x5-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 215x4 IIR 65 Shore A - Black - ORSV2-215x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 450x8 IIR 65 Shore A - Black - ORSV2-450x8-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 32,92x3,53 IIR 65 Shore A - Black - ORSV2-32,92x3,53-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 75,57x5,33 IIR 65 Shore A - Black - ORSV2-75,57x5,33-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 365x6 IIR 65 Shore A - Black - ORSV2-365x6-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 202,8x3,53 IIR 65 Shore A - Black - ORSV2-202,8x3,53-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 175x4 IIR 65 Shore A - Black - ORSV2-175x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 34x3 IIR 65 Shore A - Black - ORSV2-34x3-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 96x6 IIR 65 Shore A - Black - ORSV2-96x6-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 110x6 IIR 65 Shore A - Black - ORSV2-110x6-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 36x5 IIR 65 Shore A - Black - ORSV2-36x5-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 354x8 IIR 65 Shore A - Black - ORSV2-354x8-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 20,29x2,62 IIR 65 Shore A - Black - ORSV2-20,29x2,62-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 105x4 IIR 65 Shore A - Black - ORSV2-105x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 40x3 IIR 65 Shore A - Black - ORSV2-40x3-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 174x3 IIR 65 Shore A - Black - ORSV2-174x3-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 253,59x3,53 IIR 65 Shore A - Black - ORSV2-253,59x3,53-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 214x3 IIR 65 Shore A - Black - ORSV2-214x3-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 78x3 IIR 65 Shore A - Black - ORSV2-78x3-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 750x7 IIR 65 Shore A - Black - ORSV2-750x7-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 132 X 3 IIR65 Black O-ring Schwarz-IIR Butyl65 Shore A0 icon
O-Ring 530x6 IIR 65 Shore A - Black - ORSV2-530x6-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 24,2x3 IIR 65 Shore A - Black - ORSV2-24,2x3-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 160x6 IIR 65 Shore A - Black - ORSV2-160x6-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 154,2x5,7 IIR 65 Shore A - Black - ORSV2-154,2x5,7-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 130x4 IIR 65 Shore A - Black - ORSV2-130x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 330x6 IIR 65 Shore A - Black - ORSV2-330x6-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 38x4 IIR 65 Shore A - Black - ORSV2-38x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 240x4 IIR 65 Shore A - Black - ORSV2-240x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 54x3 IIR 65 Shore A - Black - ORSV2-54x2-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 70x5 IIR 65 Shore A - Black - ORSV2-70x5-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 355x4 IIR 65 Shore A - Black - ORSV2-355x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 648x6 IIR 65 Shore A - Black - ORSV2-648x6-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 185x4 IIR 65 Shore A - Black - ORSV2-185x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 49.2 X 5.7 IIR65 Black O-ring Schwarz-IIR Butyl65 Shore A0 icon
O-Ring 208x4 IIR 65 Shore A - Black - ORSV2-208x4-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon
O-Ring 50x5 IIR 65 Shore A - Black - ORSV2-50x5-IIR64 O-ring schwarz-IIR Butyl65 Shore A0 icon